Ethics of practice after drug conviction?

[Lil'Pon]

There was a situation many years ago in which a Social Worker practicing as a psychotherapist in Michigan was sentenced for manufacture/delivery of a controlled substance and paid a $500.00 fine for such. Not sure if it was considered a mis demanor or a felony. I believe the person in question, since it was a first time offense, was sentenced to probation. Two years after the sentence, the social worker was still counseling clients as a psychotherapist under the umbrella of his wife’s practice, who was a CSW in that state. Was (is) it legal, or ethical, in that (or other) state(s), for a first time offender, to continue to counsel clients? Or would a therapist temporarily or permanently lose license to practice due to the situation?